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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 import 'dart:async'; | |
| 6 import 'dart:collection'; | |
| 7 import 'dart:mirrors'; | |
| 8 import 'dart:sky' as sky; | |
| 9 | |
| 10 import '../app.dart'; | |
| 11 import '../rendering/box.dart'; | |
| 12 import '../rendering/object.dart'; | |
| 13 | |
| 14 export '../rendering/box.dart' show BoxConstraints, BoxDecoration, Border, Borde
rSide, EdgeDims; | |
| 15 export '../rendering/flex.dart' show FlexDirection; | |
| 16 export '../rendering/object.dart' show Point, Size, Rect, Color, Paint, Path; | |
| 17 | |
| 18 | |
| 19 // final sky.Tracing _tracing = sky.window.tracing; | |
| 20 | |
| 21 final bool _shouldLogRenderDuration = false; | |
| 22 | |
| 23 /* | |
| 24 * All Effen nodes derive from UINode. All nodes have a _parent, a _key and | |
| 25 * can be sync'd. | |
| 26 */ | |
| 27 abstract class UINode { | |
| 28 | |
| 29 UINode({ Object key }) { | |
| 30 _key = key == null ? "$runtimeType" : "$runtimeType-$key"; | |
| 31 assert(this is AbstractUINodeRoot || _inRenderDirtyComponents); // you shoul
d not build the UI tree ahead of time, build it only during build() | |
| 32 } | |
| 33 | |
| 34 String _key; | |
| 35 String get key => _key; | |
| 36 | |
| 37 UINode _parent; | |
| 38 UINode get parent => _parent; | |
| 39 | |
| 40 bool _mounted = false; | |
| 41 bool _wasMounted = false; | |
| 42 bool get mounted => _mounted; | |
| 43 static bool _notifyingMountStatus = false; | |
| 44 static Set<UINode> _mountedChanged = new HashSet<UINode>(); | |
| 45 | |
| 46 void setParent(UINode newParent) { | |
| 47 assert(!_notifyingMountStatus); | |
| 48 _parent = newParent; | |
| 49 if (newParent == null) { | |
| 50 if (_mounted) { | |
| 51 _mounted = false; | |
| 52 _mountedChanged.add(this); | |
| 53 } | |
| 54 } else { | |
| 55 assert(newParent._mounted); | |
| 56 if (_parent._mounted != _mounted) { | |
| 57 _mounted = _parent._mounted; | |
| 58 _mountedChanged.add(this); | |
| 59 } | |
| 60 } | |
| 61 } | |
| 62 | |
| 63 static void _notifyMountStatusChanged() { | |
| 64 try { | |
| 65 _notifyingMountStatus = true; | |
| 66 for (UINode node in _mountedChanged) { | |
| 67 if (node._wasMounted != node._mounted) { | |
| 68 if (node._mounted) | |
| 69 node.didMount(); | |
| 70 else | |
| 71 node.didUnmount(); | |
| 72 node._wasMounted = node._mounted; | |
| 73 } | |
| 74 } | |
| 75 _mountedChanged.clear(); | |
| 76 } finally { | |
| 77 _notifyingMountStatus = false; | |
| 78 } | |
| 79 } | |
| 80 void didMount() { } | |
| 81 void didUnmount() { } | |
| 82 | |
| 83 RenderObject _root; | |
| 84 RenderObject get root => _root; | |
| 85 | |
| 86 // Subclasses which implements Nodes that become stateful may return true | |
| 87 // if the |old| node has become stateful and should be retained. | |
| 88 // This is called immediately before _sync(). | |
| 89 // Component._retainStatefulNodeIfPossible() calls syncFields(). | |
| 90 bool _retainStatefulNodeIfPossible(UINode old) => false; | |
| 91 | |
| 92 bool get interchangeable => false; // if true, then keys can be duplicated | |
| 93 | |
| 94 void _sync(UINode old, dynamic slot); | |
| 95 // 'slot' is the identifier that the parent RenderObjectWrapper uses to know | |
| 96 // where to put this descendant | |
| 97 | |
| 98 void remove() { | |
| 99 _root = null; | |
| 100 setParent(null); | |
| 101 } | |
| 102 | |
| 103 UINode findAncestor(Type targetType) { | |
| 104 var ancestor = _parent; | |
| 105 while (ancestor != null && !reflectClass(ancestor.runtimeType).isSubtypeOf(r
eflectClass(targetType))) | |
| 106 ancestor = ancestor._parent; | |
| 107 return ancestor; | |
| 108 } | |
| 109 | |
| 110 void removeChild(UINode node) { | |
| 111 node.remove(); | |
| 112 } | |
| 113 | |
| 114 // Returns the child which should be retained as the child of this node. | |
| 115 UINode syncChild(UINode node, UINode oldNode, dynamic slot) { | |
| 116 | |
| 117 assert(oldNode is! Component || !oldNode._disqualifiedFromEverAppearingAgain
); | |
| 118 | |
| 119 if (node == oldNode) { | |
| 120 assert(node == null || node.mounted); | |
| 121 return node; // Nothing to do. Subtrees must be identical. | |
| 122 } | |
| 123 | |
| 124 if (node == null) { | |
| 125 // the child in this slot has gone away | |
| 126 assert(oldNode.mounted); | |
| 127 removeChild(oldNode); | |
| 128 assert(!oldNode.mounted); | |
| 129 return null; | |
| 130 } | |
| 131 | |
| 132 if (oldNode != null && node._key == oldNode._key && node._retainStatefulNode
IfPossible(oldNode)) { | |
| 133 assert(oldNode.mounted); | |
| 134 assert(!node.mounted); | |
| 135 oldNode._sync(node, slot); | |
| 136 assert(oldNode.root is RenderObject); | |
| 137 return oldNode; | |
| 138 } | |
| 139 | |
| 140 if (oldNode != null && node._key != oldNode._key) { | |
| 141 assert(oldNode.mounted); | |
| 142 removeChild(oldNode); | |
| 143 oldNode = null; | |
| 144 } | |
| 145 | |
| 146 assert(!node.mounted); | |
| 147 node.setParent(this); | |
| 148 node._sync(oldNode, slot); | |
| 149 assert(node.root is RenderObject); | |
| 150 return node; | |
| 151 } | |
| 152 } | |
| 153 | |
| 154 | |
| 155 // Descendants of TagNode provide a way to tag RenderObjectWrapper and | |
| 156 // Component nodes with annotations, such as event listeners, | |
| 157 // stylistic information, etc. | |
| 158 abstract class TagNode extends UINode { | |
| 159 | |
| 160 TagNode(UINode content, { Object key }) : this.content = content, super(key: k
ey); | |
| 161 | |
| 162 UINode content; | |
| 163 | |
| 164 void _sync(UINode old, dynamic slot) { | |
| 165 UINode oldContent = old == null ? null : (old as TagNode).content; | |
| 166 content = syncChild(content, oldContent, slot); | |
| 167 assert(content.root != null); | |
| 168 _root = content.root; | |
| 169 assert(_root == root); // in case a subclass reintroduces it | |
| 170 } | |
| 171 | |
| 172 void remove() { | |
| 173 if (content != null) | |
| 174 removeChild(content); | |
| 175 super.remove(); | |
| 176 } | |
| 177 | |
| 178 } | |
| 179 | |
| 180 class ParentDataNode extends TagNode { | |
| 181 ParentDataNode(UINode content, this.parentData, { Object key }): super(content
, key: key); | |
| 182 final ParentData parentData; | |
| 183 } | |
| 184 | |
| 185 typedef void GestureEventListener(sky.GestureEvent e); | |
| 186 typedef void PointerEventListener(sky.PointerEvent e); | |
| 187 typedef void EventListener(sky.Event e); | |
| 188 | |
| 189 class EventListenerNode extends TagNode { | |
| 190 | |
| 191 EventListenerNode(UINode content, { | |
| 192 EventListener onWheel, | |
| 193 GestureEventListener onGestureFlingCancel, | |
| 194 GestureEventListener onGestureFlingStart, | |
| 195 GestureEventListener onGestureScrollStart, | |
| 196 GestureEventListener onGestureScrollUpdate, | |
| 197 GestureEventListener onGestureTap, | |
| 198 GestureEventListener onGestureTapDown, | |
| 199 PointerEventListener onPointerCancel, | |
| 200 PointerEventListener onPointerDown, | |
| 201 PointerEventListener onPointerMove, | |
| 202 PointerEventListener onPointerUp, | |
| 203 Map<String, sky.EventListener> custom | |
| 204 }) : listeners = _createListeners( | |
| 205 onWheel: onWheel, | |
| 206 onGestureFlingCancel: onGestureFlingCancel, | |
| 207 onGestureFlingStart: onGestureFlingStart, | |
| 208 onGestureScrollUpdate: onGestureScrollUpdate, | |
| 209 onGestureScrollStart: onGestureScrollStart, | |
| 210 onGestureTap: onGestureTap, | |
| 211 onGestureTapDown: onGestureTapDown, | |
| 212 onPointerCancel: onPointerCancel, | |
| 213 onPointerDown: onPointerDown, | |
| 214 onPointerMove: onPointerMove, | |
| 215 onPointerUp: onPointerUp, | |
| 216 custom: custom | |
| 217 ), | |
| 218 super(content); | |
| 219 | |
| 220 final Map<String, sky.EventListener> listeners; | |
| 221 | |
| 222 static Map<String, sky.EventListener> _createListeners({ | |
| 223 EventListener onWheel, | |
| 224 GestureEventListener onGestureFlingCancel, | |
| 225 GestureEventListener onGestureFlingStart, | |
| 226 GestureEventListener onGestureScrollStart, | |
| 227 GestureEventListener onGestureScrollUpdate, | |
| 228 GestureEventListener onGestureTap, | |
| 229 GestureEventListener onGestureTapDown, | |
| 230 PointerEventListener onPointerCancel, | |
| 231 PointerEventListener onPointerDown, | |
| 232 PointerEventListener onPointerMove, | |
| 233 PointerEventListener onPointerUp, | |
| 234 Map<String, sky.EventListener> custom | |
| 235 }) { | |
| 236 var listeners = custom != null ? | |
| 237 new HashMap<String, sky.EventListener>.from(custom) : | |
| 238 new HashMap<String, sky.EventListener>(); | |
| 239 | |
| 240 if (onWheel != null) | |
| 241 listeners['wheel'] = onWheel; | |
| 242 if (onGestureFlingCancel != null) | |
| 243 listeners['gestureflingcancel'] = onGestureFlingCancel; | |
| 244 if (onGestureFlingStart != null) | |
| 245 listeners['gestureflingstart'] = onGestureFlingStart; | |
| 246 if (onGestureScrollStart != null) | |
| 247 listeners['gesturescrollstart'] = onGestureScrollStart; | |
| 248 if (onGestureScrollUpdate != null) | |
| 249 listeners['gesturescrollupdate'] = onGestureScrollUpdate; | |
| 250 if (onGestureTap != null) | |
| 251 listeners['gesturetap'] = onGestureTap; | |
| 252 if (onGestureTapDown != null) | |
| 253 listeners['gesturetapdown'] = onGestureTapDown; | |
| 254 if (onPointerCancel != null) | |
| 255 listeners['pointercancel'] = onPointerCancel; | |
| 256 if (onPointerDown != null) | |
| 257 listeners['pointerdown'] = onPointerDown; | |
| 258 if (onPointerMove != null) | |
| 259 listeners['pointermove'] = onPointerMove; | |
| 260 if (onPointerUp != null) | |
| 261 listeners['pointerup'] = onPointerUp; | |
| 262 | |
| 263 return listeners; | |
| 264 } | |
| 265 | |
| 266 void _handleEvent(sky.Event e) { | |
| 267 sky.EventListener listener = listeners[e.type]; | |
| 268 if (listener != null) { | |
| 269 listener(e); | |
| 270 } | |
| 271 } | |
| 272 | |
| 273 } | |
| 274 | |
| 275 | |
| 276 abstract class Component extends UINode { | |
| 277 | |
| 278 Component({ Object key, bool stateful }) | |
| 279 : _stateful = stateful != null ? stateful : false, | |
| 280 _order = _currentOrder + 1, | |
| 281 super(key: key); | |
| 282 | |
| 283 Component.fromArgs(Object key, bool stateful) | |
| 284 : this(key: key, stateful: stateful); | |
| 285 | |
| 286 static Component _currentlyBuilding; | |
| 287 bool get _isBuilding => _currentlyBuilding == this; | |
| 288 | |
| 289 bool _stateful; | |
| 290 bool _dirty = true; | |
| 291 bool _disqualifiedFromEverAppearingAgain = false; | |
| 292 | |
| 293 UINode _built; | |
| 294 dynamic _slot; // cached slot from the last time we were synced | |
| 295 | |
| 296 void didMount() { | |
| 297 assert(!_disqualifiedFromEverAppearingAgain); | |
| 298 super.didMount(); | |
| 299 } | |
| 300 | |
| 301 void remove() { | |
| 302 assert(_built != null); | |
| 303 assert(root != null); | |
| 304 removeChild(_built); | |
| 305 _built = null; | |
| 306 super.remove(); | |
| 307 } | |
| 308 | |
| 309 bool _retainStatefulNodeIfPossible(UINode old) { | |
| 310 assert(!_disqualifiedFromEverAppearingAgain); | |
| 311 | |
| 312 Component oldComponent = old as Component; | |
| 313 if (oldComponent == null || !oldComponent._stateful) | |
| 314 return false; | |
| 315 | |
| 316 assert(key == oldComponent.key); | |
| 317 | |
| 318 // Make |this|, the newly-created object, into the "old" Component, and kill
it | |
| 319 _stateful = false; | |
| 320 _built = oldComponent._built; | |
| 321 assert(_built != null); | |
| 322 _disqualifiedFromEverAppearingAgain = true; | |
| 323 | |
| 324 // Make |oldComponent| the "new" component | |
| 325 oldComponent._built = null; | |
| 326 oldComponent._dirty = true; | |
| 327 oldComponent.syncFields(this); | |
| 328 return true; | |
| 329 } | |
| 330 | |
| 331 // This is called by _retainStatefulNodeIfPossible(), during | |
| 332 // syncChild(), just before _sync() is called. | |
| 333 // This must be implemented on any subclass that can become stateful | |
| 334 // (but don't call super.syncFields() if you inherit directly from | |
| 335 // Component, since that'll fire an assert). | |
| 336 // If you don't ever become stateful, then don't override this. | |
| 337 void syncFields(Component source) { | |
| 338 assert(false); | |
| 339 } | |
| 340 | |
| 341 final int _order; | |
| 342 static int _currentOrder = 0; | |
| 343 | |
| 344 /* There are three cases here: | |
| 345 * 1) Building for the first time: | |
| 346 * assert(_built == null && old == null) | |
| 347 * 2) Re-building (because a dirty flag got set): | |
| 348 * assert(_built != null && old == null) | |
| 349 * 3) Syncing against an old version | |
| 350 * assert(_built == null && old != null) | |
| 351 */ | |
| 352 void _sync(UINode old, dynamic slot) { | |
| 353 assert(_built == null || old == null); | |
| 354 assert(!_disqualifiedFromEverAppearingAgain); | |
| 355 | |
| 356 Component oldComponent = old as Component; | |
| 357 | |
| 358 _slot = slot; | |
| 359 | |
| 360 var oldBuilt; | |
| 361 if (oldComponent == null) { | |
| 362 oldBuilt = _built; | |
| 363 } else { | |
| 364 assert(_built == null); | |
| 365 oldBuilt = oldComponent._built; | |
| 366 } | |
| 367 | |
| 368 int lastOrder = _currentOrder; | |
| 369 _currentOrder = _order; | |
| 370 _currentlyBuilding = this; | |
| 371 _built = build(); | |
| 372 assert(_built != null); | |
| 373 _currentlyBuilding = null; | |
| 374 _currentOrder = lastOrder; | |
| 375 | |
| 376 _built = syncChild(_built, oldBuilt, slot); | |
| 377 assert(_built != null); | |
| 378 _dirty = false; | |
| 379 _root = _built.root; | |
| 380 assert(_root == root); // in case a subclass reintroduces it | |
| 381 assert(root != null); | |
| 382 } | |
| 383 | |
| 384 void _buildIfDirty() { | |
| 385 assert(!_disqualifiedFromEverAppearingAgain); | |
| 386 if (!_dirty || !_mounted) | |
| 387 return; | |
| 388 | |
| 389 assert(root != null); | |
| 390 _sync(null, _slot); | |
| 391 } | |
| 392 | |
| 393 void scheduleBuild() { | |
| 394 setState(() {}); | |
| 395 } | |
| 396 | |
| 397 void setState(Function fn()) { | |
| 398 assert(!_disqualifiedFromEverAppearingAgain); | |
| 399 _stateful = true; | |
| 400 fn(); | |
| 401 if (_isBuilding || _dirty || !_mounted) | |
| 402 return; | |
| 403 | |
| 404 _dirty = true; | |
| 405 _scheduleComponentForRender(this); | |
| 406 } | |
| 407 | |
| 408 UINode build(); | |
| 409 | |
| 410 } | |
| 411 | |
| 412 Set<Component> _dirtyComponents = new Set<Component>(); | |
| 413 bool _buildScheduled = false; | |
| 414 bool _inRenderDirtyComponents = false; | |
| 415 | |
| 416 void _buildDirtyComponents() { | |
| 417 //_tracing.begin('fn::_buildDirtyComponents'); | |
| 418 | |
| 419 Stopwatch sw; | |
| 420 if (_shouldLogRenderDuration) | |
| 421 sw = new Stopwatch()..start(); | |
| 422 | |
| 423 try { | |
| 424 _inRenderDirtyComponents = true; | |
| 425 | |
| 426 List<Component> sortedDirtyComponents = _dirtyComponents.toList(); | |
| 427 sortedDirtyComponents.sort((Component a, Component b) => a._order - b._order
); | |
| 428 for (var comp in sortedDirtyComponents) { | |
| 429 comp._buildIfDirty(); | |
| 430 } | |
| 431 | |
| 432 _dirtyComponents.clear(); | |
| 433 _buildScheduled = false; | |
| 434 } finally { | |
| 435 _inRenderDirtyComponents = false; | |
| 436 } | |
| 437 | |
| 438 UINode._notifyMountStatusChanged(); | |
| 439 | |
| 440 if (_shouldLogRenderDuration) { | |
| 441 sw.stop(); | |
| 442 print('Render took ${sw.elapsedMicroseconds} microseconds'); | |
| 443 } | |
| 444 | |
| 445 //_tracing.end('fn::_buildDirtyComponents'); | |
| 446 } | |
| 447 | |
| 448 void _scheduleComponentForRender(Component c) { | |
| 449 assert(!_inRenderDirtyComponents); | |
| 450 _dirtyComponents.add(c); | |
| 451 | |
| 452 if (!_buildScheduled) { | |
| 453 _buildScheduled = true; | |
| 454 new Future.microtask(_buildDirtyComponents); | |
| 455 } | |
| 456 } | |
| 457 | |
| 458 | |
| 459 /* | |
| 460 * RenderObjectWrappers correspond to a desired state of a RenderObject. | |
| 461 * They are fully immutable, with one exception: A UINode which is a | |
| 462 * Component which lives within an MultiChildRenderObjectWrapper's | |
| 463 * children list, may be replaced with the "old" instance if it has | |
| 464 * become stateful. | |
| 465 */ | |
| 466 abstract class RenderObjectWrapper extends UINode { | |
| 467 | |
| 468 RenderObjectWrapper({ | |
| 469 Object key | |
| 470 }) : super(key: key); | |
| 471 | |
| 472 RenderObject createNode(); | |
| 473 | |
| 474 void insert(RenderObjectWrapper child, dynamic slot); | |
| 475 | |
| 476 static final Map<RenderObject, RenderObjectWrapper> _nodeMap = | |
| 477 new HashMap<RenderObject, RenderObjectWrapper>(); | |
| 478 | |
| 479 static RenderObjectWrapper _getMounted(RenderObject node) => _nodeMap[node]; | |
| 480 | |
| 481 void _sync(UINode old, dynamic slot) { | |
| 482 assert(parent != null); | |
| 483 if (old == null) { | |
| 484 _root = createNode(); | |
| 485 var ancestor = findAncestor(RenderObjectWrapper); | |
| 486 if (ancestor is RenderObjectWrapper) | |
| 487 ancestor.insert(this, slot); | |
| 488 } else { | |
| 489 _root = old.root; | |
| 490 } | |
| 491 assert(_root == root); // in case a subclass reintroduces it | |
| 492 assert(root != null); | |
| 493 assert(mounted); | |
| 494 _nodeMap[root] = this; | |
| 495 syncRenderObject(old); | |
| 496 } | |
| 497 | |
| 498 void syncRenderObject(RenderObjectWrapper old) { | |
| 499 ParentData parentData = null; | |
| 500 UINode ancestor = parent; | |
| 501 while (ancestor != null && ancestor is! RenderObjectWrapper) { | |
| 502 if (ancestor is ParentDataNode && ancestor.parentData != null) { | |
| 503 if (parentData != null) | |
| 504 parentData.merge(ancestor.parentData); // this will throw if the types
aren't the same | |
| 505 else | |
| 506 parentData = ancestor.parentData; | |
| 507 } | |
| 508 ancestor = ancestor.parent; | |
| 509 } | |
| 510 if (parentData != null) { | |
| 511 assert(root.parentData != null); | |
| 512 root.parentData.merge(parentData); // this will throw if the types aren't
appropriate | |
| 513 if (parent.root != null) | |
| 514 parent.root.markNeedsLayout(); | |
| 515 } | |
| 516 } | |
| 517 | |
| 518 void remove() { | |
| 519 assert(root != null); | |
| 520 _nodeMap.remove(root); | |
| 521 super.remove(); | |
| 522 } | |
| 523 } | |
| 524 | |
| 525 abstract class OneChildRenderObjectWrapper extends RenderObjectWrapper { | |
| 526 | |
| 527 OneChildRenderObjectWrapper({ UINode child, Object key }) : _child = child, su
per(key: key); | |
| 528 | |
| 529 UINode _child; | |
| 530 UINode get child => _child; | |
| 531 | |
| 532 void syncRenderObject(RenderObjectWrapper old) { | |
| 533 super.syncRenderObject(old); | |
| 534 UINode oldChild = old == null ? null : (old as OneChildRenderObjectWrapper).
child; | |
| 535 _child = syncChild(child, oldChild, null); | |
| 536 } | |
| 537 | |
| 538 void insert(RenderObjectWrapper child, dynamic slot) { | |
| 539 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 540 assert(slot == null); | |
| 541 assert(root is RenderObjectWithChildMixin); | |
| 542 root.child = child.root; | |
| 543 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 544 } | |
| 545 | |
| 546 void removeChild(UINode node) { | |
| 547 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 548 assert(root is RenderObjectWithChildMixin); | |
| 549 root.child = null; | |
| 550 super.removeChild(node); | |
| 551 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 552 } | |
| 553 | |
| 554 void remove() { | |
| 555 if (child != null) | |
| 556 removeChild(child); | |
| 557 super.remove(); | |
| 558 } | |
| 559 | |
| 560 } | |
| 561 | |
| 562 abstract class MultiChildRenderObjectWrapper extends RenderObjectWrapper { | |
| 563 | |
| 564 // In MultiChildRenderObjectWrapper subclasses, slots are RenderObject nodes | |
| 565 // to use as the "insert before" sibling in ContainerRenderObjectMixin.add() c
alls | |
| 566 | |
| 567 MultiChildRenderObjectWrapper({ | |
| 568 Object key, | |
| 569 List<UINode> children | |
| 570 }) : this.children = children == null ? const [] : children, | |
| 571 super(key: key) { | |
| 572 assert(!_debugHasDuplicateIds()); | |
| 573 } | |
| 574 | |
| 575 final List<UINode> children; | |
| 576 | |
| 577 void insert(RenderObjectWrapper child, dynamic slot) { | |
| 578 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 579 assert(slot == null || slot is RenderObject); | |
| 580 assert(root is ContainerRenderObjectMixin); | |
| 581 root.add(child.root, before: slot); | |
| 582 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 583 } | |
| 584 | |
| 585 void removeChild(UINode node) { | |
| 586 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 587 assert(root is ContainerRenderObjectMixin); | |
| 588 assert(node.root.parent == root); | |
| 589 root.remove(node.root); | |
| 590 super.removeChild(node); | |
| 591 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 592 } | |
| 593 | |
| 594 void remove() { | |
| 595 assert(children != null); | |
| 596 for (var child in children) { | |
| 597 assert(child != null); | |
| 598 removeChild(child); | |
| 599 } | |
| 600 super.remove(); | |
| 601 } | |
| 602 | |
| 603 bool _debugHasDuplicateIds() { | |
| 604 var idSet = new HashSet<String>(); | |
| 605 for (var child in children) { | |
| 606 assert(child != null); | |
| 607 if (child.interchangeable) | |
| 608 continue; // when these nodes are reordered, we just reassign the data | |
| 609 | |
| 610 if (!idSet.add(child._key)) { | |
| 611 throw '''If multiple non-interchangeable nodes of the same type exist as
children | |
| 612 of another node, they must have unique keys. | |
| 613 Duplicate: "${child._key}"'''; | |
| 614 } | |
| 615 } | |
| 616 return false; | |
| 617 } | |
| 618 | |
| 619 void syncRenderObject(MultiChildRenderObjectWrapper old) { | |
| 620 super.syncRenderObject(old); | |
| 621 | |
| 622 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 623 if (root is! ContainerRenderObjectMixin) | |
| 624 return; | |
| 625 | |
| 626 var startIndex = 0; | |
| 627 var endIndex = children.length; | |
| 628 | |
| 629 var oldChildren = old == null ? [] : old.children; | |
| 630 var oldStartIndex = 0; | |
| 631 var oldEndIndex = oldChildren.length; | |
| 632 | |
| 633 RenderObject nextSibling = null; | |
| 634 UINode currentNode = null; | |
| 635 UINode oldNode = null; | |
| 636 | |
| 637 void sync(int atIndex) { | |
| 638 children[atIndex] = syncChild(currentNode, oldNode, nextSibling); | |
| 639 assert(children[atIndex] != null); | |
| 640 } | |
| 641 | |
| 642 // Scan backwards from end of list while nodes can be directly synced | |
| 643 // without reordering. | |
| 644 while (endIndex > startIndex && oldEndIndex > oldStartIndex) { | |
| 645 currentNode = children[endIndex - 1]; | |
| 646 oldNode = oldChildren[oldEndIndex - 1]; | |
| 647 | |
| 648 if (currentNode._key != oldNode._key) { | |
| 649 break; | |
| 650 } | |
| 651 | |
| 652 endIndex--; | |
| 653 oldEndIndex--; | |
| 654 sync(endIndex); | |
| 655 } | |
| 656 | |
| 657 HashMap<String, UINode> oldNodeIdMap = null; | |
| 658 | |
| 659 bool oldNodeReordered(String key) { | |
| 660 return oldNodeIdMap != null && | |
| 661 oldNodeIdMap.containsKey(key) && | |
| 662 oldNodeIdMap[key] == null; | |
| 663 } | |
| 664 | |
| 665 void advanceOldStartIndex() { | |
| 666 oldStartIndex++; | |
| 667 while (oldStartIndex < oldEndIndex && | |
| 668 oldNodeReordered(oldChildren[oldStartIndex]._key)) { | |
| 669 oldStartIndex++; | |
| 670 } | |
| 671 } | |
| 672 | |
| 673 void ensureOldIdMap() { | |
| 674 if (oldNodeIdMap != null) | |
| 675 return; | |
| 676 | |
| 677 oldNodeIdMap = new HashMap<String, UINode>(); | |
| 678 for (int i = oldStartIndex; i < oldEndIndex; i++) { | |
| 679 var node = oldChildren[i]; | |
| 680 if (!node.interchangeable) | |
| 681 oldNodeIdMap.putIfAbsent(node._key, () => node); | |
| 682 } | |
| 683 } | |
| 684 | |
| 685 bool searchForOldNode() { | |
| 686 if (currentNode.interchangeable) | |
| 687 return false; // never re-order these nodes | |
| 688 | |
| 689 ensureOldIdMap(); | |
| 690 oldNode = oldNodeIdMap[currentNode._key]; | |
| 691 if (oldNode == null) | |
| 692 return false; | |
| 693 | |
| 694 oldNodeIdMap[currentNode._key] = null; // mark it reordered | |
| 695 assert(root is ContainerRenderObjectMixin); | |
| 696 assert(old.root is ContainerRenderObjectMixin); | |
| 697 assert(oldNode.root != null); | |
| 698 | |
| 699 (old.root as ContainerRenderObjectMixin).remove(oldNode.root); // TODO(ian
h): Remove cast once the analyzer is cleverer | |
| 700 root.add(oldNode.root, before: nextSibling); | |
| 701 | |
| 702 return true; | |
| 703 } | |
| 704 | |
| 705 // Scan forwards, this time we may re-order; | |
| 706 nextSibling = root.firstChild; | |
| 707 while (startIndex < endIndex && oldStartIndex < oldEndIndex) { | |
| 708 currentNode = children[startIndex]; | |
| 709 oldNode = oldChildren[oldStartIndex]; | |
| 710 | |
| 711 if (currentNode._key == oldNode._key) { | |
| 712 assert(currentNode.runtimeType == oldNode.runtimeType); | |
| 713 nextSibling = root.childAfter(nextSibling); | |
| 714 sync(startIndex); | |
| 715 startIndex++; | |
| 716 advanceOldStartIndex(); | |
| 717 continue; | |
| 718 } | |
| 719 | |
| 720 oldNode = null; | |
| 721 searchForOldNode(); | |
| 722 sync(startIndex); | |
| 723 startIndex++; | |
| 724 } | |
| 725 | |
| 726 // New insertions | |
| 727 oldNode = null; | |
| 728 while (startIndex < endIndex) { | |
| 729 currentNode = children[startIndex]; | |
| 730 sync(startIndex); | |
| 731 startIndex++; | |
| 732 } | |
| 733 | |
| 734 // Removals | |
| 735 currentNode = null; | |
| 736 while (oldStartIndex < oldEndIndex) { | |
| 737 oldNode = oldChildren[oldStartIndex]; | |
| 738 removeChild(oldNode); | |
| 739 advanceOldStartIndex(); | |
| 740 } | |
| 741 | |
| 742 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 743 } | |
| 744 | |
| 745 } | |
| 746 | |
| 747 class UINodeAppView extends AppView { | |
| 748 | |
| 749 UINodeAppView({ RenderView renderViewOverride: null }) | |
| 750 : super(renderViewOverride: renderViewOverride) { | |
| 751 assert(_appView == null); | |
| 752 } | |
| 753 | |
| 754 static UINodeAppView _appView; | |
| 755 static AppView get appView => _appView; | |
| 756 static void initUINodeAppView({ RenderView renderViewOverride: null }) { | |
| 757 if (_appView == null) | |
| 758 _appView = new UINodeAppView(renderViewOverride: renderViewOverride); | |
| 759 } | |
| 760 | |
| 761 void dispatchEvent(sky.Event event, HitTestResult result) { | |
| 762 assert(_appView == this); | |
| 763 super.dispatchEvent(event, result); | |
| 764 for (HitTestEntry entry in result.path.reversed) { | |
| 765 UINode target = RenderObjectWrapper._getMounted(entry.target); | |
| 766 if (target == null) | |
| 767 continue; | |
| 768 RenderObject targetRoot = target.root; | |
| 769 while (target != null && target.root == targetRoot) { | |
| 770 if (target is EventListenerNode) | |
| 771 target._handleEvent(event); | |
| 772 target = target._parent; | |
| 773 } | |
| 774 } | |
| 775 } | |
| 776 | |
| 777 } | |
| 778 | |
| 779 abstract class AbstractUINodeRoot extends Component { | |
| 780 | |
| 781 AbstractUINodeRoot({ RenderView renderViewOverride }) : super(stateful: true)
{ | |
| 782 UINodeAppView.initUINodeAppView(renderViewOverride: renderViewOverride); | |
| 783 _mounted = true; | |
| 784 _scheduleComponentForRender(this); | |
| 785 } | |
| 786 | |
| 787 void syncFields(AbstractUINodeRoot source) { | |
| 788 assert(false); | |
| 789 // if we get here, it implies that we have a parent | |
| 790 } | |
| 791 | |
| 792 void _buildIfDirty() { | |
| 793 assert(_dirty); | |
| 794 assert(_mounted); | |
| 795 assert(parent == null); | |
| 796 _sync(null, null); | |
| 797 } | |
| 798 | |
| 799 } | |
| 800 | |
| 801 abstract class App extends AbstractUINodeRoot { | |
| 802 | |
| 803 App({ RenderView renderViewOverride }) : super(renderViewOverride: renderViewO
verride); | |
| 804 | |
| 805 void _buildIfDirty() { | |
| 806 super._buildIfDirty(); | |
| 807 | |
| 808 if (root.parent == null) { | |
| 809 // we haven't attached it yet | |
| 810 UINodeAppView._appView.root = root; | |
| 811 } | |
| 812 assert(root.parent is RenderView); | |
| 813 } | |
| 814 | |
| 815 } | |
| 816 | |
| 817 typedef UINode Builder(); | |
| 818 | |
| 819 class RenderObjectToUINodeAdapter extends AbstractUINodeRoot { | |
| 820 | |
| 821 RenderObjectToUINodeAdapter( | |
| 822 RenderObjectWithChildMixin<RenderBox> container, | |
| 823 this.builder | |
| 824 ) : _container = container, super() { | |
| 825 assert(builder != null); | |
| 826 } | |
| 827 | |
| 828 RenderObjectWithChildMixin<RenderBox> _container; | |
| 829 RenderObjectWithChildMixin<RenderBox> get container => _container; | |
| 830 void set container(RenderObjectWithChildMixin<RenderBox> value) { | |
| 831 if (_container != value) { | |
| 832 assert(value.child == null); | |
| 833 if (root != null) { | |
| 834 assert(_container.child == root); | |
| 835 _container.child = null; | |
| 836 } | |
| 837 _container = value; | |
| 838 if (root != null) { | |
| 839 _container.child = root; | |
| 840 assert(_container.child == root); | |
| 841 } | |
| 842 } | |
| 843 } | |
| 844 | |
| 845 final Builder builder; | |
| 846 | |
| 847 void _buildIfDirty() { | |
| 848 super._buildIfDirty(); | |
| 849 if (root.parent == null) { | |
| 850 // we haven't attached it yet | |
| 851 assert(_container.child == null); | |
| 852 _container.child = root; | |
| 853 } | |
| 854 assert(root.parent == _container); | |
| 855 } | |
| 856 | |
| 857 UINode build() => builder(); | |
| 858 } | |
| OLD | NEW |
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